The simplified index model which is based on total returns is often used to estimated security betas, which is no theoretical foundation. 经过简化的基于总收益形式的指数模型被经常用来估计证券贝塔,但这个模型没有理论依据。
MIX is the traditionally the time when Silverlight betas are announced and this year is no exception. MIX传统上都会宣布某个Silverlight测试版发布,今年也不例外。
Community server add-on betas will be released separately. 相关的插件,只会分开来发布。
In between these major betas we will also release some interim or 'edge' builds with bug fixes or experimental features. 在这些大的beta版本之间,我们还将发布一些临时版本或者修改了一些错误或增加了一些试验特性的“edge”build。
They distribute betas over the network and get their customers to do the testing for free! 他们在网络上分发β版,让客户免费给他们做测试!
Betas for individual stocks can vary according to whether the overall market direction is upwards or downwards. A stock may be riskier in a falling market than a rising market. 个股的贝塔系数可能会随着大盘的升或跌而变动,有些股票在跌市中可能会较在升市具更高风险。
Studies on the Stability and Time Variation of Industrial Betas in Shenzhen Stock Market 深市行业贝塔系数的稳定性与时变性研究
Q: We plan to continue releasing betas over the next few months, with each beta introducing one or more new features. 我们计划在接下来的几个月继续发布beta版,每个beta版引入一个或多个新特性。
Time-varying Betas in Chinese Stock Market: Industry Effect 我国股市行业时变β系数研究
Study on the Properties of China Real Estate Industry Return and Betas 我国房地产行业收益及其β值特征研究
We drive an asset pricing model when the market is clearing. This paper shows that the linear relationship of CAPM still holds and there are three betas, and the risk of market and benchmark portfolio is priced in this model. 得出了一种基于对称PBF合同的资产定价模型,在该模型中,CAPM模型的线性关系仍然满足,且模型中有三个β值,市场风险和基准组合风险成为定价因素。
This means that different industry portfolio should be used different models to estimate the mean of betas. 这也就意味着不同行业投资组合应该适用于不同的模型求出各行业的贝塔均值。
Third, no matter added betas, size, book-to-market, momentum or liquidity, the negative relation between divergence of opinions and stock returns is significant in cross-section regression strategy. 在横截面分析中,无论是否加入β值、公司规模、账面/市值比、动量因素或者是流动性因素,我国股市均表现出异质信念与股票横截面收益的显著负相关性。
For the above methods, this paper tested them in the video library of various betas. 对于上述方法,分别在各种复杂的视频图像序列上进行了测试。